What is the perimeter of a triangular field if one side measures 20 meters, the second side is twice the length of the first, and the third side is three times the length of the first?
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Math question: What is the axis of symmetry of the graph represented by the equation y = -2x² + 5x + 1?
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Math question: What is the median of a set whose elements are {1, 3, 5, 7, 9}?